331538023 has 4 divisors (see below), whose sum is σ = 331662240. Its totient is φ = 331413808.

The previous prime is 331537993. The next prime is 331538033. The reversal of 331538023 is 320835133.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 320835133 = 1993 ⋅160981.

It is a cyclic number.

It is not a de Polignac number, because 331538023 - 2⁹ = 331537511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 331537982 and 331538000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (331538033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58015 + ... + 63472.

It is an arithmetic number, because the mean of its divisors is an integer number (82915560).

Almost surely, 2^331538023 is an apocalyptic number.

331538023 is a deficient number, since it is larger than the sum of its proper divisors (124217).

331538023 is a wasteful number, since it uses less digits than its factorization.

331538023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 124216.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 331538023 is about 18208.1856042825. The cubic root of 331538023 is about 692.1142341791.

The spelling of 331538023 in words is "three hundred thirty-one million, five hundred thirty-eight thousand, twenty-three".